<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        table, tr, td {
            /*边框：边框的粗细 边框的线型 边框的颜色*/
            border: 1px solid red;
            /*边框线合并*/
            border-collapse: collapse;
            width: 500px;
            height: 100px;
            text-align: center;
        }
    </style>
</head>
<body>
<!--四行5列的表格-->
<table>
    <tr>
        <td>11</td>
        <td>12</td>
        <td>13</td>
        <td>14</td>
        <td>15</td>
    </tr>
    <tr>
        <td>11</td>
        <td>12</td>
        <td>13</td>
        <td>14</td>
        <td>15</td>
    </tr>
    <tr>
        <td>11</td>
        <td>12</td>
        <td>13</td>
        <td>14</td>
        <td>15</td>
    </tr>
    <tr>
        <td>11</td>
        <td>12</td>
        <td>13</td>
        <td>14</td>
        <td>15</td>
    </tr>
</table>
</body>
</html>
